<template>
  <div class="loginContainer">
    <div class="loginInner">
      <div class="login_header">
        <h2 class="login_logo">硅谷外卖</h2>
        <div class="login_header_title">
          <a href="javascript:;" :class="{on : loginWay }" @click="loginWay=true">短信登录</a>
          <a href="javascript:;" :class="{on : !loginWay }" @click="loginWay=false">密码登录</a>
        </div>
      </div>
      <div class="login_content">
        <form  @submit.prevent="login">
          <div :class="{on : loginWay}">
            <section class="login_message">
              <input type="tel" maxlength="11" placeholder="手机号" v-model="phone">
              <button
                  :disabled="!rightPhone" class="get_verification"
                  :class="{right_phone:rightPhone}"
                  @click.prevent="getCode"
              >{{computedTime ? `已发送(${computedTime}s)` : '获取验证码'}}</button>
            </section>
            <section class="login_verification">
              <input type="tel" maxlength="8" placeholder="验证码" v-model="code">
            </section>
            <section class="login_hint">
              温馨提示：未注册硅谷外卖帐号的手机号，登录时将自动注册，且代表已同意
              <a href="javascript:;">《用户服务协议》</a>
            </section>
          </div>
          <div :class="{on : !loginWay }">
            <section>
              <section class="login_message">
                <input type="text" maxlength="11" placeholder="手机/邮箱/用户名" v-model="name">
              </section>
              <section class="login_verification">
                <input type="text" maxlength="8" placeholder="密码" v-if="showPwd" v-model="pwd">
                <input type="password" maxlength="8" placeholder="密码" v-else v-model="pwd">
                <div class="switch_button" :class="showPwd?'on':'off'" @click="showPwd=!showPwd">
                  <div class="switch_circle" :class="{right:showPwd}"></div>
                  <span class="switch_text">{{showPwd?'adc':'...'}}</span>
                </div>
              </section>
              <section class="login_message">
                <input type="text" maxlength="11" placeholder="验证码" v-model="captcha">
                <img class="get_verification"
                     src="http://localhost:4000/captcha" alt="captcha"
                     @click="getCaptcha" ref="captcha"
                >
              </section>
            </section>
          </div>
          <button class="login_submit">登录</button>
        </form>
        <a href="javascript:;" class="about_us">关于我们</a>
      </div>
      <span class="go_back" @click="$router.back()">
        <i class="iconfont icon-jiantou2"></i>
      </span>
    </div>
    <alert-tip :alertText="alertText" @closeTip="closeTip" v-show="alertShow"></alert-tip>
  </div>
</template>

<script>
  import AlertTip from 'components/AlertTip/AlertTip';
  import {reqSendCode, reqSmsLogin,reqPwdLogin} from "../../api";

  export default {
    components:{
      AlertTip
    },
    data() {
      return {
        loginWay: true,  //true代表短信登陆 false代表密码登陆
        showPwd: false,
        computedTime: 0,   //计时器
        alertText: '', //提示框文本
        alertShow: false, //是否显示提示框

        phone: '',  //手机号
        code: '', //短信验证码
        name: '', //用户名
        pwd:'',  //密码
        captcha: '' //图片验证码
      }
    },
    computed: {
      rightPhone() {
        return /^1\d{10}$/.test(this.phone);
      }
    },
    methods: {
      async getCode() {
        //如果当前没有计时
        if(!this.computedTime) {
          //启动计时
          this.computedTime = 30;
          this.intervalId = setInterval(()=>{
            this.computedTime --;
            if(this.computedTime<=0) {
              clearInterval(this.intervalId)
            }
          }, 1000);

          // 发ajax请求, 向手机号发验证码
          const result = await reqSendCode(this.phone);
          if (result.code === 1) {
            // 显示提示框
            this.showAlert(result.msg);
            if(this.computedTime) {
              this.computedTime = 0;
              clearInterval(this.intervalId);
            }
          }
        }
      },

      async login() {
        let result;
        if(this.loginWay) { // 短信登陆
          const {rightPhone, phone, code} = this;
          // 表单验证
          if(!rightPhone) { // 手机号
            this.showAlert('请输入正确的手机号');
            return
          } else if(!/^\d{6}$/.test(code)) { // 验证码
            this.showAlert('请输入正确的验证码');
            return
          }
          // 提交登陆请求
          result = await reqSmsLogin({phone, code})

          // 处理返回
        } else {// 密码登陆
          const {name, pwd, captcha} = this;
          // 表单验证
          if(!name) { // 用户名
            this.showAlert('请输入用户名');
            return
          } else if(!pwd) { // 密码
            this.showAlert('请输入密码');
            return
          } else if(!captcha) { // 图片验证码
            this.showAlert('请输入验证码');
            return
          }
          // 提交登陆请求
          result = await reqPwdLogin({name, pwd, captcha})
          // 处理返回
        }

        //停止计时
        if(this.computedTime) {
          this.computedTime = 0;
          clearInterval(this.intervalId);
        }

        //根据结果数据处理
        if(result.code===0) {
          const user = result.data;
          //将user保存到vuex的state
          this.$store.dispatch('recordUserInfo',user);
          //去个人中心界面
          this.$router.replace('/profile')
        }else {
          //显示新的图片验证码
          this.getCaptcha();
          //显示警告提示
          const msg = result.msg;
          this.showAlert(msg);
        }
      },
      closeTip() {
        this.alertShow = false;
        this.alertText = '';
      },
      getCaptcha() {
        this.$refs.captcha.src = 'http://localhost:4000/captcha?' + Date.now();
      },
      showAlert(alertText) {
        this.alertShow = true;
        this.alertText = alertText;
      }
    },
    mounted() {
      this.getCaptcha()
    }
  }
</script>

<style lang="stylus" scoped>
  @import "../../common/stylus/mixins.styl"
  .loginContainer
    width 100%
    height 100%
    background #fff
    .loginInner
      padding-top 60px
      width 80%
      margin 0 auto
      .login_header
        .login_logo
          font-size 40px
          font-weight bold
          color #02a774
          text-align center
        .login_header_title
          padding-top 40px
          text-align center
          >a
            color #333
            font-size 14px
            padding-bottom 4px
            &:first-child
              margin-right 40px
            &.on
              color #02a774
              font-weight 700
              border-bottom 2px solid #02a774
      .login_content
        >form
          >div
            display none
            &.on
              display block
            input
              width 100%
              height 100%
              padding-left 10px
              box-sizing border-box
              border 1px solid #ddd
              border-radius 4px
              outline 0
              font 400 14px Arial
              &:focus
                border 1px solid #02a774
            .login_message
              position relative
              margin-top 16px
              height 48px
              font-size 14px
              background #fff
              .get_verification
                position absolute
                top 50%
                right 10px
                transform translateY(-50%)
                border 0
                color #ccc
                font-size 14px
                background transparent
                &.right_phone
                  color black
            .login_verification
              position relative
              margin-top 16px
              height 48px
              font-size 14px
              background #fff
              .switch_button
                font-size 12px
                border 1px solid #ddd
                border-radius 8px
                transition background-color .3s,border-color .3s
                padding 0 6px
                width 30px
                height 16px
                line-height 16px
                color #fff
                position absolute
                top 50%
                right 10px
                transform translateY(-50%)
                &.off
                  background #fff
                  .switch_text
                    float right
                    color #ddd
                &.on
                  background #02a774
                >.switch_circle
                  //transform translateX(27px)
                  position absolute
                  top -1px
                  left -1px
                  width 16px
                  height 16px
                  border 1px solid #ddd
                  border-radius 50%
                  background #fff
                  box-shadow 0 2px 4px 0 rgba(0,0,0,.1)
                  transition transform .3s
                  &.right
                    transform translateX(30px)
            .login_hint
              margin-top 12px
              color #999
              font-size 14px
              line-height 20px
              >a
                color #02a774
          .login_submit
            display block
            width 100%
            height 42px
            margin-top 30px
            border-radius 4px
            background #4cd96f
            color #fff
            text-align center
            font-size 16px
            line-height 42px
            border 0
        .about_us
          display block
          font-size 12px
          margin-top 20px
          text-align center
          color #999
      .go_back
        position absolute
        top 5px
        left 5px
        width 30px
        height 30px
        >.iconfont
          font-size 20px
          color #999
</style>